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Appl Environ Microbiol. 1982 March; 43(3): 578-584

Survival of Vibrio cholerae and Escherichia coli in estuarine waters and sediments.

M A Hood and G E Ness

ABSTRACT

In in vitro estuarine water and sediment chambers, the survival of Vibrio cholerae and Escherichia coli was determined by plate counting and direct counting techniques. V. cholerae strains included environmental, clinical, and serotype O1 and non-O1 isolates, whereas E. coli strains included ATCC 25922 and a freshly cultured human isolate. Recovery of V. cholerae varied significantly with incubation temperature. Growth and extended periods of survival occurred in sterile sediments, sterile waters, and nonsterile waters, but not in nonsterile sediments. In contrast to V. cholerae, viable cells of E. coli decreased rapidly in both sterile and nonsterile estuarine waters. Direct counts revealed that E. coli cells were intact in the estuarine water, but attempts to resuscitate them were unsuccessful. The data suggest that V. cholerae survives better in estuarine waters than E. coli. The results may explain the recent observations that V. cholerae levels do not correlate well with fecal coliform concentrations in estuarine waters. Furthermore, the results add increasing evidence to support the theory that V. cholerae is an autochthonous bacterium in estuaries.

Appl Environ Microbiol. 1982 March; 43(3): 578-584




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